Callao climate

Name: Callao
Address: PE

Callao is warmest in February, with average highs of 26 °C, and coldest in August, when nights average 15 °C. February is the wettest month (26 mm) and August the driest (0.8 mm). Figures are 1991–2020 climate normals.

Across a full year Callao averages 85 mm of rain and 89 days above 25 °C.

Peru · population 1,226,200 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month February 26 °C
Coldest month August 15 °C
Driest month August 1 mm
Wettest month February 26 mm
Least cloud August 52 % cloud
Hottest on record February 31 °C
Coldest on record July 11 °C
Warmest sea February 22 °C

What to expectCallao through the year

Callao has a clear annual cycle: average daily highs run from 19 °C in August to 26 °C in February, a swing of 6.7 °C in mean temperature across the year.

Counted across a normal year, 89 days a year reach 25 °C, 0 of them reach 30 °C. The warmest reading in the 1991–2020 record is 31 °C, in February.

Rain is spread fairly evenly through the year, from 1 mm in August to 26 mm in February. There is no dry season to aim for.

The sea off Callao is warmest in February at 22 °C and coldest in September at 17 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	25.5 °C	14 mm	86 %
February	26.5 °C	26 mm	89 %
March	26.4 °C	22 mm	87 %
April	24.5 °C	6 mm	72 %
May	22.2 °C	1 mm	58 %
June	20.4 °C	1 mm	57 %
July	19.5 °C	1 mm	54 %
August	19.4 °C	1 mm	52 %
September	19.9 °C	2 mm	59 %
October	20.7 °C	2 mm	70 %
November	21.8 °C	2 mm	76 %
December	23.6 °C	6 mm	83 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C
January	25.5 °C	20.3 °C	22.4 °C	29.7 °C	17.5 °C	20
February	26.5 °C	21.4 °C	23.5 °C	30.5 °C	19.4 °C	27
March	26.4 °C	21.1 °C	23.3 °C	30.0 °C	18.0 °C	27
April	24.5 °C	19.4 °C	21.6 °C	28.7 °C	16.5 °C	11
May	22.2 °C	17.6 °C	19.5 °C	27.3 °C	14.4 °C	1
June	20.4 °C	16.2 °C	17.9 °C	26.5 °C	13.4 °C	0
July	19.5 °C	15.3 °C	17.1 °C	25.3 °C	11.4 °C	0
August	19.4 °C	14.9 °C	16.8 °C	25.7 °C	12.4 °C	0
September	19.9 °C	15.2 °C	17.1 °C	25.5 °C	13.0 °C	0
October	20.7 °C	15.8 °C	17.8 °C	24.0 °C	12.3 °C	0
November	21.8 °C	16.8 °C	18.8 °C	25.9 °C	14.1 °C	0
December	23.6 °C	18.5 °C	20.6 °C	28.2 °C	15.8 °C	3

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	14 mm	4	13 h/day	86 %	84 %	15 km/h	20.8 °C
February	26 mm	7	12 h/day	89 %	83 %	14 km/h	21.5 °C
March	22 mm	6	12 h/day	87 %	83 %	14 km/h	21.2 °C
April	6 mm	2	12 h/day	72 %	85 %	14 km/h	19.7 °C
May	1 mm	0	12 h/day	58 %	86 %	14 km/h	18.9 °C
June	1 mm	0	11 h/day	57 %	86 %	15 km/h	18.4 °C
July	1 mm	0	11 h/day	54 %	86 %	15 km/h	17.7 °C
August	1 mm	0	12 h/day	52 %	85 %	15 km/h	17.1 °C
September	2 mm	0	12 h/day	59 %	84 %	15 km/h	16.9 °C
October	2 mm	0	12 h/day	70 %	84 %	16 km/h	16.9 °C
November	2 mm	0	13 h/day	76 %	84 %	16 km/h	17.8 °C
December	6 mm	1	13 h/day	83 %	84 %	15 km/h	19.2 °C

How Callao compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Callao	26 °C	15 °C	85 mm	89
Lima · Peru	26 °C	15 °C	85 mm	91
Santa Anita - Los Ficus · Peru	25 °C	14 °C	85 mm	25
Chincha Alta · Peru	26 °C	16 °C	55 mm	127
Huancayo · Peru	17 °C	4.9 °C	1,509 mm	0
Huánuco · Peru	23 °C	13 °C	964 mm	15
Ica · Peru	30 °C	15 °C	78 mm	316

Where Callao ranks

Ranking	Position	Value
Places with the best weather in South America year-round	9thof 50	89/100
The driest places in South America in May	11thof 50	1.4 mm
The driest places in South America in November	13thof 50	2.2 mm
Places with the best weather in South America in October	14thof 50	92/100
The driest places in South America year-round	17thof 50	7.1 mm
The driest places in South America in December	18thof 50	5.9 mm

Planning a trip? See the best time to visit Callao.

QuestionsCommon questions about Callao’s climate

When is the best time to visit Callao?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, November, December sit closest to 20 °C on average, February is the warmest month and August the driest. The month-by-month table above has the full picture.

How hot does Callao get?

In February, the warmest month, daily highs average 26 °C. About 0 days a year pass 30 °C. The highest value in the 1991–2020 record is 31 °C.

How cold does it get in winter?

Nights average 15 °C in August, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Callao?

February, averaging 26 mm over 7 days with rain. The driest month is August with 1 mm. The year as a whole averages 85 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Callao rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.